Bottom-trimming-knife wiper.



D. PETR-PALMBDO.

BoTToM lTRIMMING KNIFE WIPER. APPLICATION FILED DEO.13, 1912.

1,108,391 Patented Aug. 25, 1914.

2 SHBETS-SEEBT 1.

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D. PBTRLPALMEDO.

BOTTOM TRIMMING KNIFE WIPER.

APPLIUATTON FILED DBO. 13, 1912.

1 l 08,39 1 Patented Aug. 25, 1914.

2 SHEETS-SHEET 2.

MGM-mw THE ADRRIS PETERS Co.. PHOTU-LiTHO, WASHING TON. U t;v

UNITED sTATEs rgATENT omen.

`IMZCU'II) PETRLPALJEHQEDO, 0F BRIDG-EPORT, CONNECTICUT, AESIGNOR E0 ELCTRIC COMPSETR CUMPANY, F NEW YRK, Y., A CRPORALTN NEW" BOTTOM-TBIMMIG-KNIFE WIPER.

Specification. of Letters Patent. Application filed December 13, 1912. Serial No. Montt.

lrrtnritctl Actin'. 191.4.

Tooll 107mm #muy concern:

lie it known that l, DAVID Pn'rm-PALi\rnDo, a citizen of the United States, residing at iridgeport, in the county of Fairfield and State of Connecticut, have invented a certain newand useful Improvement in Bottom-rlfrimming-Kilife` llipers, of which the :following is a full, clear, and exact description.

ln line casting machines the mold in moving from the easingto the slug ejecting position passes a bottom trimming knife, that is to say, a fined knife which engages the pot-side facci of the mold and extendsacross the mold slot so that, as the mold moves in the direction stated, this knife` will shave off the sprue from the bottom of the newly castslug close to the mold, thereby making the slug accurately type high..

Experience has shown that while bottom trimming knives clean the pot-side face of thermoid while the mold is moving to the slug ejecting position, the shavings from the slug frequently clingto the knife so that, when the mold again moves toward the cast* ing position, it may wipe the shavings from the knife and carry them along adhering to its facefethat is, the face of the mold. lf

such shavings do cling to and find lodgment on the pot-side `face of the moldthey will and carries an ejector blade J whicli,dining preventthe tight locking ofthe pot nozzle against the mold during` the next casting operation. .y

. rlhe object ofthis invention is to prevent this, and it accomplishes this result by wiping the shavings `from the bottom trimming knife while the mold is in the ejecting position.

The invention consists in the construction and combination of parts which are shown `1n the drawing and hereinafter described and definitely pointedout in theclaims.

In the drawing, Figure l is a `plan view partly in section of mechanism embodying the invention. Fig. 2 is a front elevation of said mechanism. Fig. Sis a side elevation of the mechanism embodying the present invention shown in its relation to the mold, which lat'teris shown in section. Fig.` L.tis a detached plan view of the knife and the front end of the shank and a sectional View of the associated knife wiper.

In the drawing, M represents the mold which may be of any suitable construction,

as, for example, such as is shown and debottom` of the slug. carriesclose lto its right edge a post g, from `which a "stud g1 projects lateraliy; and on jthis stud is mounted a roller o. @n the rocking frame li is a cam surface 1 arranged to be engaged by this roller, said surface benne,- inclined downward from rear `to front.` The spring F so turnsthe rocio scribed in latent N 511,027,551 That iste say, itis a mold which moves in a liioritontal path between the casting and. cjiccting positions. 1 The bottom trimming knife .lilA has its cutting edge formed en the arclof circle which is concentric with a cylindrical stud or shank lil, to the front end of "which the knife `is fixed. This shank is non-rotatably mounted in suitably fined brackets C, C; and `is adjustable lengthwise therein by means `of nuts L, so that said `knife will properly engage with the pot-side face of the mold. A rocking frame B is mounted on this shank l-l, so that it may turn there on and may also have slight endwise move ment tln-ireon.y lhe knife wider l) "fined to the front end of this rock n.; f eine.. `[t` is a small b1. ss linger so shaped that it will engage the beveled rear face of the logiifo edge. fr coiled spring l? surrounds shank ftionandalso acts, while it is so turningthis frame, to move the frame lengthwise of the stud so as te insure close contact of the y wiper with the knife. In order to move this knife wiper frame in the contrarydirection," use is made of the ejector slide ttwhich is af necessary part of the machine. lfhis slide moves horizontally backward and forward the forward movement of the slide, engages the`slu, f1r in the mold and pushes it ont,- after which the slide moves rearward. It is therefore obvious that both the 'forward and backward movement of the ejector slide j must take place while the mold `is `inl the mold erecting pos1tion,-that is to say, after the bottom trimming knife has trinnned the This eyector slide Gr ing frame as to hold this cam surface in engagement with the roller. New, when; the ejector slide moves forward on its slug ejecting journey, it allows this spring to turn the rocking frame in the knife wiping direction, and also allows the spring to move the frame forward so that the knife wiper will. as* the `traine turned by the spring, closely hug the knife edge. IVhen, however, the slide moves rearward, this roller, by engaging the cam surface, will rock the wiper frame so as to carry it back to its original position. The engagement of the roller with the cam surface b1 which, as stated, inclines upward from front to rear, also causes a slight rearward movement of the roclnng frame, which results in the substantial disengagement of the wiper from the kriife edge during this cam-induced rocking movement of the wiper frame back to its normal position. The disengagement of the wiper from the lmife by this slight rearward movement of the wiper frame, will generally insure that in its retur. movement the wiper will not redeposit the shavings onto the knife blade. Such action is, however, additionally provided for by so shaping and proportioning the parts shown that the knife wiper will have a throw or movement through a greater arc than the arc of the knife edge. That is to say, the wiper will swing past and out of engagement with the knife at both ends of its path. If any chips or shavings have adhered to the wiper, they will likely drop off of the same after it has moved out of engagement with the knife.

Having described `my invention, I claim:

l. In a line casting machine, the combination with the movable mold, and a bottom trimming knife which engages the pot-side face of the mold and has its cutting edge in the form of the arc of a circle, with a knife wiper frame which is mounted to rock about an axis which is coincident with the center of the knife edge arc, a knife wiper secured to said frame for engagement with the knife edge, and means for rocking said frame from and then back to its normal position while thermold is in the slug-ejecting position.

2. In a line casting machine, the combination with the movable mold, and a bottom trimming knife which engages the pot-'side face of the mold and has its cutting edge in the form of the arc of a circle, with a knife wiper frame which is mounted to rock about an axis which is coincident with the center of the knife edge arc, a knife wiper secured to said frame for engagement with. the knife edge,-the throw of the said wiper frame being such as to carry the wiper beyond and out of engagement with the knife edge at both ends thereof.

3. In a line casting machine, the combination with the movable mold, and a bottom of the knife edge arc, and is also capable of endwise movement, a wiper finger secured to said frame for engagement with said knife edge, a spring acting on said frame to turn it in the knife wiping direction and to simultaneously move it endwise to cause the wiper to engage said knife edge, and means for turning said frame in the opposite direction to carry it back to its normal po sition.

4. In a line casting 'machine,'the combination with a movable mold, and a bottom trimming knife which engages the pot-side face of the mold 'and has its cutting edge inthe form of the arc of a circle, a cylindrical non-rotatable shank to which the knife is attached, which shank is concentric with the circle of which the knife edge is an arc, a wiper frame mounted upon said shank so as to be capable of turning and moving endwise thereon, a spring acting on said frame and tending to turn it in one direction and to move it forward, a knife wiper fixed to said frame and adapted by the forward movementthereof to closely contact with the knife edge, and means for swinging said frame in the opposite direction back to its normal position.

5. In a line casting machine, the combination with a movable mold, and a bottom trimming knife which engages the pot-side face of the mold and has its cutting edge in the form of the arc of a circle, a cylindrical non-rotatable shank to which the knife is attached, which shank is concentric with the circle of which the knife edge is an are, a wiper frame which is mounted upon said shank and is capable of turning and of moving endwise thereon and is provided with a cam surface, a spring acting upon said wiper frame to turn it inon'e direction and to move it endwise forward, and `a slide movable in a path at right angles to the path of the mold, and a roller carried by said frame and engaging with said `cam surface.

In testimony whereof I hereunto aflix my signature in the presence of two witnesses.

DAVID PETRI-PALMEDO.

IVitnesses: i

4EDWARD F. GODDARD, F. P. STILLMAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, ID. C. 

